The guest list is anticipated to include a new generation of Trump-aligned insiders, such as wealthy CEOs, socialites and figures from Donald Trump Jr.'s exclusive Georgetown club.
The event takes place amidst significant political challenges for the Republican Party, including internal divisions, low morale and upcoming midterm election concerns.
Trump's recent actions, such as vetoing a bipartisan bill and publicly criticizing a Republican district attorney, underscore the growing rifts within the party.
With his approval rating at 36 percent and the impending expiration of Obamacare subsidies, the gathering at Mar-a-Lago is framed as a resistance outpost for his supporters.